<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>用户登录</title>
</head>

<body>
<h2>登录</h2>
  <form action="/dologin" method="post">
      用户名：<input type="text" name="username"/>
      <br/>
      密码：<input type="password" name="password"/>
      <br/>
      <input type="submit" value="登录"/>
  </form>
</body>
</html>